Valve



E- v. scHAAL.

' June 13, `1944.

I `VALVE Filed Jan. 1, 1942' Patented June 13, 1944 VALVE A Earl V. Schaal, East Aurora, N.Y Y., assignor to Trico Products Corporation, Buffalo, N.Y.

Application January 1, 1942, Serial No. 425,317

Claims. (Cl. 251-127) This invention -relates to valve means adapted to permit fluid liow in one direction only, such devices being commonly known in the art as check valves.

According to the present invention a check valve is providedwhich is simple and extremely effective, from the standpoint of both sensitivity and tightness of'seal. The improved check valve meansv involves a minimum number of parts and in the form illustrated in the drawing and described'in detail herein by way of example is applied to a fluid pressure vessel in such manner as to be incorporated with a fluid conduit which is normally provided for establishing fluid communication with such vessel. Other objects and. advantages attendant upon a pursuance of the principles of-the present invention will be apparent to those'skilled in the art from a consideration of the' specic form of the invention shown in thedrawing and described in detail. It is to be understood, however, that the specific disclosure herein contained is by way of exampleonly, and that the invention is not to be considered as limited in spirit `or scope, otherwise than as dened in the appended claims.

In the accompanying drawing:

Fig. 1 is an-end elevational View of a cylindrical vessel to which the device of the present invention is shown applied in exemplary form;

Fig. 2 is anenlarged cross-sectional View takenapproximately on vthe line II-II of Fig.

1; and

Fig. 3'is a vfragmentary elevational view looking at lthe inside 'of thev end wall of the vessel.

Throughout 'theseveral lfigures ofthe drawing like character-s of reference denote like parts and the numeral I0 designates a cylindrical vessel having an end wall I I.

In the illustrated instance the wall II is provided with an embossed depression comprising an annular nange I2 and a bottom wall I3, the latter being substantially parallel with but offset from the wall II proper. A discoidal cover element I4 cooperates with the ilange I2 and the bottom wall I3 to form a valve chamber l5 and in the instant form the cover element is formed frusto-conically for reasons which will presently appear. An outer marginal flange I6 of the cover element I4 seats against a spacing ring I'I disposed against the wall I3. In this manner space is provided for limited opening movement of a Valve disc I8.

The valve disc I8 has a central opening 20 and the Wall I3 is provided with a circular row of openings 2l disposed about the opening 20 in such manner as to be out of communication with the opening when the valve disc I8 is seated against the wall I3. The portion of the wall I3 surrounding the openings 2l is preferably spaced from direct contact with the adjacent surface of the valve I 8 and to this end an annular embossment 22 maybe provided.

In a preferred form of the invention the valve disc I8 may be formed of a non-metallic material such as that known commercially as Fabricoid and, since the valve I8 is free to rotate, impressions of the openingsr2I, which might be formed on the surface of thevalve I8 if it were in contactwith the edges of the opening, would interfere with proper seating, hence the desirability of the annular embossment 22.

In the illustrated form the means for retainingthe cover element I4 in securely assembled position is combined with passage means for establishing fluid now from the valve chamber I5 and suchmeans include a pin 25, one end of which is necked down as at 26 and secured in an opening in the bottom wall I3 as by welding, soldering, riveting or the like. The pin has transverse passages 21 communicating with an axial opening 28 which is fitted with a nipple 29 or other suitable iiuid conduit at one end.

As appears clearly from Fig. 2, the pin 25 extends through a central opening 4in the cover element I4 and is externally threaded to receive a nut 30 for applying external pressure against the cover element I4. If desired a sealing washer 3I may be interposed between the cover element and the nut 30. l n

Clamping. pressure on .the cover element I4, as applied by tightening the nut30, has a tendency to slightly atten the cover element I4 and consequently urge its periphery into intimate engagement with the annular ange I2 and thereby render more effective the fluid-tight condition of the valve chamber I5. In the form illustrated the wall II of the vessel I0 is shown as having flanged openings for receiving nipples 38. The nipples 36 may be connected with any suitable conduits for establishing a fluid pressure system.

In one form the apparatus illustrated may have the nipple 29 connected with a source of sub-atmospheric pressure, such as the intake manifold of a vehicle engine or a, mechanical vacuum pump. The nipples 36 may then be connected with suitable iiuid motors for operating the latter. By reason of the presence of the storage vessel I0 and the check valve arrangement the application of vacuum to the vessel I0 through the nipple 29 may be intermittent and Variable.

What is claimed is:

1. Check valve structure comprising a supporting wall, a cup-like depression formed therein, and a cover element iitting snugly into said depression and cooperating therewith to form a valve chamber, a disc valve within said chamber adapted to seat againstthe bottom wall of said cup-like depression Vand having a central opening therein, means rigidly attached to said bottom wall and extending through said openin-g for adjustable engagement with said cover element to clamp the same in assembled position, said cover element being outwardly convex whereby clamping action urges the periphery of the vcover element into intimate engagement with the anabout the tubular member to define with the y bottom a chamber for the valve member, the tubular member having radial passage means opening into the chamber, and means engaged with the protruding end of the tubular member and reacting on the raised central portion of the cover element to expand the outlying margin of the latter firmly into the recess.

4, A check'valve comprising, awall having a portion thereof depressedlto orniairecess, the bottom of the recess being formed with an annular groove having a circular series of ports,

" the opposite sides of the rim of the groove form- '.ing a valve seat, a bodily movable annular valve nular wall of said depression, said bottom wall having a fluid passage whereby movement of said valve from seated position establishes fiuid communication through said Wall,

2. Check valve' structure comprising a supporting wall, alcun-like depression formed therein, and a cover elementfitting snugly into said depression and cooperating therewith to form a valve chamber, said cover element having a central opening therein, a disc valve within said chamber adapted to'seat against the bottom wall of saidcup-like depression and having a central opening therein, means rigidly attached to said bottom wally and extending through said valve opening and-said cover opening, and means engaging the protruding portion of said first mentioned means and bearing against said cover element to clamp the same inassembled position, f"

said cover f element being outwardly convex whereby clamping action urges the periphery of the cover element into intimate engagement with the annular wall of said depression, said bottom wall having a fiuid passage whereby movement of said valve from seated position establishes fluid communication through said wall.

3. Ay check valve comprising a wall having a portion thereof depressed to form a recess, the bottom of the recess being formed with a circular series of ports and constituting a valve seat, a bodilykmovable annular valve member engaging the seat, a Vsheet-like cover element having its margin fitting snugly within the recess and supported a distance above the valve member to define the extent of b odily movement of the latter, a tubular member fixed to and upstandingV from the bottom within the series of ports, the upperend of the tubular member'being open and protruding through the cover element, the central portion of the cover element being raised member engaging the seat, a sheet-like cover element having its margin fitting snugly within the recessV and supported a distance above the valve member to define the extent of bodily movement of the latter, a tubular member fixed to andV upstanding from the bottom within the series of ports,the Aupper end'vof thetubular member being open and protruding through the cover element, the central vportion of the' cover element being raised about the tubular.' member to denne withy the bottom a' `chamber for the valve member, the tubular memberfhaving radial passage means -opening vinto theychamber,` and means engaged with the protruding end of the tubular member and reacting on `the raised central portion of the cover element to expand the outlying margin Vof the' latter firmly into Vthe recess. ,y

5. A check valve Vcomprising a wall having a portion thereof depressed to form-1aI recess, 'the bottom of the recess being formedwlth a circular series of ports and constituting a valve seat, a bodily movable annular valve member engaging the seat, a sheet-likecover element having its margin fitting snugly `within the recessand supported a distance above the valve memberto define the extent of bodily movement of thelatter, a tubular member fixed torand upstanding from the bottom within the series of ports, Athe upper end of the tubulanmemberbeing open y and protruding through the cover element, the central portion offmthe cover element being frustro-conica1 whereby itscentral portion is raised and engages about .the tubular member to define with the bottom a chamber for the valvemember, the tubular member having radial Vpassage means opening into the chamber, and means engaged with the protruding end of the tubular member and reacting on the raised central portion of the cover elementto expand theoutlying margin of the latter firmly intothe recess.

V- SCHAAL." 

